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Romina Nobahari

dblp:410/2042 · DBLP profile ↗
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1ranked-venue papers
0as first author
1since 2021 · last 2025
—ORCID · none

Domains — the database's venue-derived domains; a paper can count in several

Artificial intelligence and machine learning · 1 · 1 since 2021

Expertise — from the expertise taxonomy: the topics of the expert's papers under the CCF categories. A weight counts papers with recency: 1 for a paper about the topic, 0.3 when the topic is its context, halved every five years.

Artificial intelligence
1 paper
Trustworthy machine learning · 100%
Databases, data mining, and information retrieval
1 paper
Data mining · 100%

Topics — the 4 heaviest of 5, each with the papers that count most for it

TopicWeightPapersLastEvidence papers
Machine learning › Trustworthy machine learning › fairness › fair unsupervised learning
fair clustering
0.912025
Towards Fair Representation: Clustering and Consensus · COLT 2025
Machine learning › Trustworthy machine learning
fairness
0.912025
Towards Fair Representation: Clustering and Consensus · COLT 2025
Data mining
clustering
0.912025
Towards Fair Representation: Clustering and Consensus · COLT 2025
Data mining › clustering
ensemble clustering
0.912025
Towards Fair Representation: Clustering and Consensus · COLT 2025

Methods — techniques the papers use, named apart from their topics

approximation algorithm · 1.7NP-hardness · 1.7
YearPublicationVenuePosition
2025 Towards Fair Representation: Clustering and Consensus
abstract
Consensus clustering, a fundamental task in machine learning and data analysis, aims to aggregate multiple input clusterings of a dataset, potentially based on different non-sensitive attributes, into a single clustering that best represents the collective structure of the data. In this work, we study this fundamental problem through the lens of fair clustering, as introduced by Chierichetti et al. [NeurIPS’17], which incorporates the disparate impact doctrine to ensure proportional representation of each protected group in the dataset within every cluster. Our objective is to find a consensus clustering that is not only representative but also fair with respect to specific protected attributes. To the best of our knowledge, we are the first to address this problem and provide a constant-factor approximation. As part of our investigation, we examine how to minimally modify an existing clustering to enforce fairness – an essential postprocessing step in many clustering applications that require fair representation. We develop an optimal algorithm for datasets with equal group representation and near-linear time constant factor approximation algorithms for more general scenarios with different proportions of two group sizes. We complement our approximation result by showing that the problem is NP-hard for two unequal-sized groups. Given the fundamental nature of this problem, we believe our results on Closest Fair Clustering could have broader implications for other clustering problems, particularly those for which no prior approximation guarantees exist for their fair variants.
Diptarka Chakraborty, Kushagra Chatterjee, Debarati Das 0001, Tien Long Nguyen, Romina Nobahari
COLT5